If a co-winner exists, the stored information is displayed. If not, the area remains empty. But the ex:if-exists attribute is not very powerful, because it has no "else" attribute.

There are a few ways to approach "else" conditions in Exhibit. Exhibit offers a "switch" element on properties. Here, the div stays empty if Class.offering is 'Currently Offered,' otherwise it displays the .offering status.

Though there doesn't exist an actual ex:else-exists attribute, there is simple if/else logic available, as shown in these two examples (you may or may not need curled braces, depending on where you're using this code).